Some players will argue that cards like Fiery Confluence and Mystic Confluence are auto-includes in many EDH decks with those colors, and also staples of formats like Cube, but the others are playable in the right spots
You can just cycle these away to draw cards for alternative value out of a card that would otherwise be dead in your hand
It's great early, but you're having to get rid of a card that might impact your ability to get to the late game, and you may not have all the colors you need in the mid-game if you don't have it in your opening hand
Natures Claim FINAL FANTASY: Through the Ages, Uncommon Limited: 1.0 Search for the Frozen Esper (Natures Claim) is another sideboard card and one with pretty absurd art
Frequently Asked Questions How much is Dratini worth
In the TCG, Hearthflame Mask Ogerpon ex is a force to be reckoned with